Speaking as someone who (reluctantly) has been on the board of my HOA for 7+ years now--it's amazing the number of things that condo owners don't realize their dues have to pay for. Not just physical things, like landscaping, building repairs, water, sewer, pools and such (tho that is certainly a large chunk), but also the 'invisible' stuff--paying for insurance (of various types, including liability, damage, earthquake, flood, depending on what is needed), maintenance of parking areas and parking structures (asphalt, restriping and resealing ain't cheap!), legal representation (so that the HOA can go after deadbeat owners who aren't paying their bills/refusing to fix their units/causing other problems), even paying for the property management company itself (so that there's a manager there to handle the literally hundreds of e-mails, get bids from contractors, interface with lawyers/insurance agents/everyone else, and take emergency calls 24/7). And that's without ever factoring in the amount of money an HOA needs to keep in reserve in case of catastrophic repairs and the like. Most HOAs are chronically underfunded on that front--according to our property manager, our HOA is one of the better ones she's seen, and we still have less than half the recommended amount in savings. But bringing it up to recommended levels would require tripling our dues, which would cause all the owners to storm the annual budget meeting in mass protest, so we have to settle for 'good enough' and hope we don't run into a catastrophe that would require a special assessment.
I can't say whether your HOA dues are reasonable without knowing your area and looking at your association's budget (something that every condo owner should do regularly, IMHO), but I just wanted to point out that there's a lot more behind the scenes that has to be paid for than most people realize. A previous property manager said something that's always stuck with me: "when you buy a condo, don't think of yourself as the owner of a single unit, but rather as a part-owner of a multi-million dollar property."
The upside to all this, of course, is that if you're not on the board, then you have the luxury of not having to worry about any of this, as it's taken care of by the HOA. You pay your dues and as long as you have a reasonably competent board/property manager, then everything else just happens invisibly. It's when you get incompetent managers/board members that the horror stories happen, and then people bitch about how evil and awful and overbearing HOAs are.